檔案管理

mkdir, rmdir, mv, rm, cp, touch, cat, tac, echo, more, less, head, tail, file, find, rename, ln, pwd, scp, alias

磁碟管理

ls, cd, du, df, mount, unmounts, fdisk

文件處理

wc, sort, uniq, cut, sed, awk, grep, vi, diff

使用者和組

useradd, usermod, passwd, userdel, groupadd, groupdel, chgrp, su

檔案傳輸

get, put, wget

網路通訊

telnet, nc, ifconfig, ping, netstat, ip, host

備份壓縮                         

gzip, bzip2, bunzip2, tar, zip

系統管理

exit, kill, last, ps, top, free, pstree, reboot, halt, shutdown, sudo, who, w, whoami, whereis, which, last, whatis

系統設定

clear, set, unset, hwclock, time, date,

其他

history, hostname, nohup, service, init, rpm, ssh, cal, yum

[[email protected] ~]# man clear